Donald Paul Wengert (born November 6, 1969) is an American former professional baseball pitcher.

He played all or part of seven seasons in Major League Baseball (MLB) from 1995 to 2001 for the Oakland Athletics, San Diego Padres, Chicago Cubs, Kansas City Royals, Atlanta Braves and Pittsburgh Pirates.

Wengert attended Iowa State University, and in 1991 played collegiate summer baseball with the Hyannis Mets of the Cape Cod Baseball League.

Prior to attending Iowa State University, Wengert attended high school and played baseball at Bishop Heelan Catholic High School.

This biographical article relating to an American baseball pitcher born in the 1960s is a stub.